Most Helpful Guy
it would not be disrespectful to tell him you would love to help. You tell him you two are friends first, and you want to help your friend. Not out of obligation but out of love and friendship. Then tell him you will help anyway he needs if, but here are some specific things you know you could do: x, y and z
Most Helpful Girl
Help as much as you can.
He'll appreciate it... trust me!
It's definitely not disrespectful.
I would consider "disrespect" telling him that you don't want to hear about his problems anymore, or showing that you are physically unsupportive.
You are doing the complete opposite.
You have nothing to be doubtful about.
You seem like a loving, caring, and wonderful girlfriend <3